四年级下册数学简便计算题.doc

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-/ 四年级下册数学简便计算题 第一类:加 65+73+135 357+288+143 272+68+28 129+235+171+165 17+145+23+35 999+99+9+3 6+7+8+102+103+104 9998+3+99+998+3+9 第二类:减 400-256-44 517-53-47 284-159-41 258-42-16 545-167-145 478-47-178 344-(144+37) 236-(177+36) 第三类:乘 4545 23 52 2594 8(12513) (250125)(48) 88125 72125 1256425 4212585 25488125 第四类:乘 (12+50)40 125(40-4) 76103 18125 2544 4225 999 9978 第五类:乘 4537+3755 2821+2879 1723-237 3846+6438 9932+32 46+4659 1672+1673+1675 398+639-394 28225-2225-6225 (42+25)125+(18+15)125 2324+2542+2718+2581 9922+3334 第六类:除 36049 25052 600125 80058 480548 240512 42035 240025 780012 第七类:加减 92+99 197+102 354-108 405-99 127-98 323+189-123 248+86-48 672-36+64 (6467-832)+(1832-1467) 1530+(592-530)-192 (2+4+6+……+98+100)-(1+3+5+……+97+99) 第八类:乘除 9604648 9900012111 3702381234 640(164) 1000(1254) 第九类:加减乘除 (98+147)49 (230-23)23 (250-25)25 173628+106428 125(860+24012) 700+612124 (37+15)85+1360 200520062006-200620052005 4212585 25488125 (12+50)40 125(40-4) 86103 18125 2544 4225 999 9978 4538+3855 2821+2879 3723-237 3846+6438 9932+32 46+4659 1672+1673+1675 398+639-394 28225-2225-6225 (42+25)125+(18+15)125 65+73+135 357+288+143 272+68+28 129+235+171+165 17+145+23+35 400-256-44 517-53-47 284-159-41 258-42-16 545-167-145 478-47-178 344-(144+37) 236-(177+36) 4545 23 52 2594 8(12513) (250125)(48) 88125 72125 1256425 4212585 25488125 (12+50)40 125(40-4) 76103 18125 2544 4225 999 9978 4537+3755 2821+2879 1723-237 3846+6438 9932+32 46+4659 1672+1673+1675 398+639-394 36049 25052 600125 80058 480548 240512 42035 117+392+608 8827+2712 8753+8747 775-725 234―66―34 528―53―47 435-(135+189) 16725+3225+25 3899+38 147+14799 25(4+8) 10875 35201 7598 2574 212586 2532125 12588 2548 3500425 420352 30+255+70 282+41+159 8827+2712 6.3 1.8 12564+12536 64199+64 528―53―47 158+395+105 480025 (13856)(456) 2.1 99 + 2.1 0.18 +4.26 -0.18 +4.26 8100475 16800120 124824 315015 (10000-1000-100-10)10 138+293+62+107 99+999+9999+99999 66.86-8.66-1.34 881189 10 - 0.432 - 2.568 98199 25 6.8 0.04 355+260+140+245 10299 2125 645-180-245 12532 2546 10156 9926 382101-382 460508 930 0.6 5 1022-478-422 63.4 2.5 0.4 2357-183-317-357 672-36+64 36+64-36+64 500-257-34-143 755-287+87 1814-378-422 8999+89 3999+498 88225+22512 698-291-9 568-(68+178) 382+165+35-82 155+256+45-98 759-126-259 216+89+11 7599+275 1050157 72002430 219 99 58 101 76 102 7846+7854 169123—23169 129101—129 5651+5648+56 1252532 2425 514+189—214 732—254—332 56254125 2474+2624 228+(72+189) 109+(291—176) (375+1034)+(966+125) (2130+783+270)+1017 参考答案 第一类:加 65+73+135 357+288+143 272+68+28 =65+135+73 =357+143+288 =272+28+68 =273 =788 =368 129+235+171+165 17+145+23+35 999+99+9+3 =129+171+(235+165) =17+23+(145+35) =999+1+(99+1)+(9+1) =700 =220 =1110 6+7+8+102+103+104 9998+3+99+998+3+9 =102+8+(7+103)+(6+104) =9998+2+(99+1)+(998+1)+(9+1) =330 =11110 第二类:减 400-256-44 517-53-47 284-159-41 =400-(256+44) =517-(53+47) = 284-(156+41) =100 =417 =84 258-42-16 545-167-145 478-47-178 =258-(42+16) =545-145-167 =478-178-47 =200 =233 =233 344-(144+37) 236-(177+36) =244-144-37 =236-36-177 =63 =23 第三类:乘 4545 23 52 2594 =45(45) =23(52) =2549 =90 =230 =900 8(12513) (250125)(48) 88125 =812513 =1258(2504) =812511 =13000 =1000000 =11000 72125 1256425 4212585 =81259 =1258(258) =425(1258) =9000 =200000 = 210000 25488125 =100(8125) 11 =1100000 第四类:乘 (12+50)40 125(40-4) 76103 =1240+5040 =12540-1254 =76(100+3) =880 =5400 =76100+763 =7828 18125 2544 4225 999 =(10+8)125 =25411 =22521 =10125+8125=2250 =110 =1050 9978 =(100-1) 78 =10078-178 =7722 第五类:乘 4537+3755 2821+2879 1723-237 =37+(45+55) =28(21+79) =23(17-7) =3700 =2800 =230 3846+6438 9932+32 46+4659 =38(46+64) =32(99+1) = 46(59+1) =38110 =3200 =2760 =38(100+10) =38100+3810 =4180 1672+1673+1675 398+639-394 =167(2+3+5) =39(8+6-4) =1670 =390 28225-2225-6225 (42+25)125+(18+15)125 =225(28-2-6) =125(42+18+25+15) =4500 =12500 2324+2542+2718+2581 9922+3334 =8(23+25+27) =33(66+34) =600 =3300 第六类:除 36049 25052 600125 =360(49) = 250(52) =600(125) =10 =25 =10 80058 480548 240512 =80085 =480485 =240125 =20 =2 =4 42035 240025 780012 =42075 =240055 =780062 =12 =96 =650 第七类:加减 92+99 197+102 354-108 =92+(100-1) =197+(100+2) =354-(100+8) =92+100-1 =197+100+2 =354-100-8 =191 =299 =246 405-99 127-98 323+189-123 =405-(100-1) =127-(100-2) =323-123+189 = 405-100+1 =127-100+2 =389 =306 =29 248+86-48 672-36+64 (6467-832)+(1832-1467) =248-48+86 =672-(36+64) =6467-1467+(1832-832) = 286 =572 =6000 1530+(592-530)-192 (2+4+6+……+98+100)-(1+3+5+……+97+99) =1530-530+(592-192) =(2-1)+(4-3)+…+(98-97)+(100-99) =1400 =1+1+...+1+1 =50 第八类:乘除 9604648 9900012111 3702381234 =9604846 =99000(12111) =12343381234 =920 =9000 =114 640(164) 1000(1254) =640164 =10001254 =160 =32 第九类:加减乘除 (98+147)49 (230-23)23 (250-25)25 =9849+14749 =23023-2323 =25025-2525 =5 =9 =9 173628+106428 125(860+24012) 700+612124 =(1736+1064) 28 =125880 =700+612344 =100 =1258110 =700+204 =110000 =904 (37+15)85+1360 200520062006-200620052005 =5085+285+1360 =2005200610001-2006200510001 =4250+170+1360 =0 =5610+170=5780 4212585 25488125 =1258(425) =10011(8125) =210000 =1100000 (12+50)40 125(40-4) 86103 =1240+5040 =12540-1254 =86(100+3) =680 =4500 =86100+863 =8858 18125 2544 4225 =(10+8) 125 =25411 =22521 =12510+1258 =1100 =1050 =2250 999 9978 4538+3855 =(100-1) 9 =(100-1) 78 =(45+55) 38 =1009-9 =78100-78 =3800 =91 =7722 2821+2879 3723-237 3846+6438 =(21+79) 79 =(37-7) 23 =(46+64) 38 =7900 =690 =3800 9932+32 46+4659 1672+1673+1675 =(99+1) 32 =(59+1) 59 =(2+3+5) 167 =3200 =3540 =1670 398+639-394 28225-2225-6225 =(8+6-4) 39 =(28-2-6) 225 =390 =2500 (42+25)125+(18+15)125 65+73+135 357+288+143 =[(42+18)+(25+15)] 125 =65+135+73 =357+143+288 =12500 =273 =788 272+68+28 129+235+171+165 17+145+23+35 =272+28+68 =129+171+(235+165) =17+23+(145+35) =368 =700 =220 400-256-44 517-53-47 284-159-41 258-42-16 =400-(256+44) =517-(53+47) =284-(159+41) =100 =417 =84 545-167-145 478-47-178 344-(144+37) =545-145-167 =478-178-47 =344-144-37 =233 =253 =163 236-(177+36) 4545 23 52 =236-36-177 =45(45) =23(52) =23 =90 =230 2594 8(12513) (250125)(48) =2549 =812513 =2504(1258) =900 =13000 =1000000 88125 72125 1256425 =11(8125) =9(8125) =1258(825) =11000 =9000 =100000 4212585 25488125 (12+50)40 =425(8125) =10011(8125) =1240+5040 =210000 =1100000 =2480 125(40-4) 76103 18125 =12540-1254 =76(100+3) =(10+8) 125 =4500 =76100+376 =10125+8125 =7828 =2250 2544 4225 999 9978 =25(40+4) =(40+2) 25 =(100-1) 9 =(100-1) 78 =2540+254 =4025+225 =9100-9 =7800-78 =1100 =1050 =891 =7722 4537+3755 2821+2879 1723-237 =(45+55) 37 =(21+79) 79 =(17-7) 23 =3700 =7900 =230 3846+6438 9932+32 46+4659 =(46+64) 38 =(99+1) 32 =(59+1) 46 =11038 =3200 =2760 =(10+100) 38 =3810+38100 =4180 1672+1673+1675 398+639-394 36049 =(2+3+5) 167 =(8+6-4) 39 =360(49) =1670 =390 =10 25052 600125 80058 480548 =250(52) =600(125) =80085 =480485 =25 =10 =20 =2 240512 42035 117+392+608 8827+2712 =240125 =42075 =117+(392+608) =(88+12) 27 =4 =12 =1117 =2700 8753+8747 775-725 234―66―34 =(53+47) 87 =(75-25) 7 =234-34-66 =8700 =350 =134 528―53―47 435-(135+189) 16725+3225+25 =528-(53+47) =435-135-189 =(167+32+1) 25 =428 =111 =5000 3899+38 147+14799 25(4+8) =(99+1) 38 =(99+1) 147 =254+825 =3800 =14700 =300 10875 35201 7598 =(100+8) 75 =35(200+1) =75(100-2) =8100 =7035 =7350 2574 212586 2532125 =2547 =26(1258) =254(8125) =700 =12000 =100000 12588 2548 3500425 =25811 =2586 =3500(425) =11000 =600 =35 420352 30+255+70 282+41+159 =420(352) =30+70+255 =282+(41+159) =60 =355 =482 8827+2712 6.3 1.8 12564+12536 =(88+12) 27 =6.30.92 =(64+36) 125 =2700 =3.5 =12500 64199+64 528―53―47 158+395+105 =64(199+1) =528-(53+47) =158+(395+105) =12800 =428 =658 480025 (13856)(456) 2.1 99 + 2.1 =4810025 =13(84) (55) (66) =2.1(99+1) =484 =26 =210 =192 0.18 +4.26 -0.18 +4.26 8100475 16800120 =4.26+4.26+(0.18-0.18) =(81x100)4(25x3) =(12000+4800)120 =8.52 =813x(100425) =140 124824 315015 (10000-1000-100-10)10 =1248122 =315053 =1000010-100010-10010-1010 =52 =210 =1000-(100+10+1)
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